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Q: The measure of an exterior angle of a triangle is120 degrees the interior angles that are not adjacent to this exterior angle are congruent find the measure of the interior angles of the triangle?

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No. It is equal to the sum of the opposite interior angles.

Theorem: An measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.An exterior angle is formed by one side of a triangle and the extension of an adjacent side of the triangle.In the triangle at the right,

They are called supplementary angles.

Interior and adjacent exterior angles form a straight line so exterior angle = 180 - interior angle. If you are satisfied with this reply please consider awarding a Recommended Point to the responder.

Related questions

Are two angle of a triangle that are not adjacent to the exterior angle

Remote interior angles

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No. It is equal to the sum of the opposite interior angles.

When any side of triangle is extended outwards then exterior angle is formed. Sum of this exterior angle and adjacent interior angle = 180o. If exterior angle = 180o(straight angle) then interior adjacent angle is 0o which is not possible. So exterior angle can't be straight angle.

Theorem: An measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.An exterior angle is formed by one side of a triangle and the extension of an adjacent side of the triangle.In the triangle at the right,

They are called supplementary angles.

Yes it does. Good work!

Interior and adjacent exterior angles form a straight line so exterior angle = 180 - interior angle. If you are satisfied with this reply please consider awarding a Recommended Point to the responder.

Exterior and interior angles at the vertex of a triangle add up to 180 degrees

Exterior and interior angles at the vertex of a triangle add up to 180 degrees

Exterior and interior angles at the vertex of a triangle add up to 180 degrees

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